John Deere 757 Z Track wiring diagram

[Auto Doc's]

Hello folks,

EDIT: This turned out to be a 2nd help request because the original one did not show up when I searched earlier.

This site is clunky at best.

I have an early serial number JD 757 that I am working on for a customer, I need a wiring diagram for it. The only one I could locate online is blurry and incomplete. Specifically, I am dealing with a red square block, plug in harness diode that is usually found on most large JD riders and zero turn mowers. The one on this mower tests bad with a multimeter.

I am not a fan of jumping safety switches and only do so for testing purposes. Currently I have the seat switch jumped and the diode removed so I can operate the mower.

 

[StarTech]

A shorted diode and allow the brake relay to kill the engine if the seat is jumpered. BTW JD run voltage thru the seat switch to activate magneto relay, Due to this these seat switch to burn out.

 

[Auto Doc's]

Yep, the diode is shorted (failed) internally, the PNP material has failed and not resistant in only one direction. The multimeter tests .000 in both directions and I have removed it for now so I could run the machine and test the rest of the systems.

My customer wants me to simply (recklessly) bypass the seat switch and leave the diode out, but I cannot blindly accept the liability for their "convenience".